Who knows how many millions it cost Shane Mosley that he didn’t throw more punches against Vernon Forrest in the 139-pound Olympic box-offs of 1992?

Oscar De La Hoya went on to win the gold at Barcelona, became the ‘Golden Boy’, made Mosley take the long, hard way to the big paydays that still aren’t as big as they should be in and out of the ring, never mind that Mosley’s 38-0 record includes a convincing 2000 decision over De La Hoya.

De La Hoya still can take his good old time accepting a rematch with Mosley, still gets the endorsements while the dynamic WBC welterweight champion gets another crack at Forrest tomorrow night at The Theatre at Madison Square Garden.

Promoter Cedric Kushner calls it “Sweet Revenge.” But Mosley says he doesn’t need any extra motivation to do business, even if he’s still not doing the business he probably should be because of that loss 10 years ago.

Payback for missed paydays? Mosley merely shrugs and says he lost other amateur bouts besides the one to Forrest. That one happened in another time, another place, against what now seems like another fighter.

“The only thing I remember is I think I could have fought him harder, did different things,” said Mosley. “[Sparring] with him after the fight I was like ‘I made that hard and it was really an easy fight.’

“Now, it’s like that fight didn’t even take place. I watch his fights, it’s like I was never in the ring with him before. I look at him and think I’m going to murder him. He’s too slow. I can’t understand what he could possibly do to take me 12 rounds.”

Forrest (33-0, 26 KOs) says he has a copy of that three-round box-off bout in Worcester, Mass., now so irrelevant he hasn’t even watched it.

“I’ve watched him enough against other guys to know he can be beaten,” said Forrest. “I’ve seen enough of his fights to see his mistakes. He makes so many it gets me jacked.”